<template>
	<view>
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滚动视图区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<blockv v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i===active ? 'active' : '']" @click="activeChange(i)">
						{{item.cat_name}}
					</view>
				</blockv>
			</scroll-view>
			<!-- 右侧的滚动视图区域 -->
			<scroll-view class="right-scroll-view" scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2 , i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 -->
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon.replace('ugo-dev','hmugo-web')" ></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 窗口的可用高度 = 屏幕高度 - navigationBar高度 - tabBar 高度
				wh: 0,
				cateList: [],
				active: 0,
				//二级分类的列表数据
				cateLevel2: [],
				scrollTop:0,
			};
		},
		onLoad() {
			// 获取当前系统的信息
			const sysInfo = uni.getSystemInfoSync()
			// 为 wh 窗口可用高度动态赋值
			this.wh = sysInfo.windowHeight- 50

			this.getCateList()
		},
		methods: {
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('/api/public/v1/categories')
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				//为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChange(i) {
				this.active = i
           // console.log(i);
				//重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children
				this.scrollTop=this.scrollTop===0 ? 1 : 0
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
				})
			},
			gotoSearch(){
				// console.log('ok');
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				line-height: 60px;
				background-color: #f7f7f7;
				text-align: center;
				font-size: 12px;

				// 激活项的样式
				&.active {
					background-color: #ffffff;
					position: relative;

					// 渲染激活项左侧的红色指示边线
					&::before {
						content: ' ';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						left: 0;
						top: 50%;
						transform: translateY(-50%);
					}
				}
			}
		}
	}

	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list {
	  display: flex;
	  flex-wrap: wrap;
	
	  .cate-lv3-item {
	    width: 33.33%;
	    margin-bottom: 10px;
	    display: flex;
	    flex-direction: column;
	    align-items: center;
	
	    image {
	      width: 60px;
	      height: 60px;
	    }
	
	    text {
	      font-size: 12px;
	    }
	  }
	}
</style>